package com.central.log.aspect;

import java.lang.reflect.Method;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import com.alibaba.fastjson.JSON;
import com.central.log.annotation.UserOperationLog;
import com.central.log.model.UserOperationLogEntity;
import com.central.log.service.UserOperationLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;

@Aspect
@Component
public class UserOperationLogAspect {

    @Autowired
    private UserOperationLogService userOperationLogService;

    /**
     * 设置操作日志切入点 记录操作日志 在注解的位置切入代码
     */
    @Pointcut("@annotation(com.central.log.annotation.UserOperationLog)")
    public void operLogPoinCut() {
    }

    /**
     * 正常返回通知，拦截用户操作日志，连接点正常执行完成后执行， 如果连接点抛出异常，则不会执行
     *
     * @param joinPoint 切入点
     * @param keys      返回结果
     */
    @AfterReturning(value = "operLogPoinCut()", returning = "keys")
    public void saveOperLog(JoinPoint joinPoint, Object keys) {
        // 获取RequestAttributes
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        // 从获取RequestAttributes中获取HttpServletRequest的信息
        HttpServletRequest request = (HttpServletRequest) requestAttributes
                .resolveReference(RequestAttributes.REFERENCE_REQUEST);

        UserOperationLogEntity operlog = new UserOperationLogEntity();
        try {

            // 从切面织入点处通过反射机制获取织入点处的方法
            MethodSignature signature = (MethodSignature) joinPoint.getSignature();
            // 获取切入点所在的方法
            Method method = signature.getMethod();
            // 获取操作
            UserOperationLog opLog = method.getAnnotation(UserOperationLog.class);
            if (opLog != null) {
                String operModul = opLog.operModul();
                String operType = opLog.operType();
                String operDesc = opLog.operDesc();
                operlog.setOperModul(operModul); // 操作模块
                operlog.setOperType(operType); // 操作类型
                operlog.setOperDesc(operDesc); // 操作描述
            }
            // 获取请求的类名
            String className = joinPoint.getTarget().getClass().getName();
            // 获取请求的方法名
            String methodName = method.getName();
            methodName = className + "." + methodName;

            operlog.setOperMethod(methodName); // 请求方法

            // 请求的参数
            Map<String, String> rtnMap = converMap(request.getParameterMap());
            // 将参数所在的数组转换成json
            String params = JSON.toJSONString(rtnMap);

            operlog.setOperRequParam(params); // 请求参数
            operlog.setOperRespParam(JSON.toJSONString(keys)); // 返回结果
//                operlog.setOperUserId(UserShiroUtil.getCurrentUserLoginName()); // 请求用户ID
//                operlog.setOperUserName(UserShiroUtil.getCurrentUserName()); // 请求用户名称
//                operlog.setOperIp(IPUtil.getRemortIP(request)); // 请求IP
            operlog.setOperUri(request.getRequestURI()); // 请求URI
            userOperationLogService.insert(operlog);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     131      * 异常返回通知，用于拦截异常日志信息 连接点抛出异常后执行
     132      *
     133      * @param joinPoint 切入点
     134      * @param e         异常信息
     135      */
     @AfterThrowing(pointcut = "operLogPoinCut()", throwing = "e")
     public void saveExceptionLog(JoinPoint joinPoint, Throwable e) {
         // 获取RequestAttributes
         RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
         // 从获取RequestAttributes中获取HttpServletRequest的信息
         HttpServletRequest request = (HttpServletRequest) requestAttributes
                 .resolveReference(RequestAttributes.REFERENCE_REQUEST);
         UserOperationLogEntity excepLog = new UserOperationLogEntity();
         try {
             // 从切面织入点处通过反射机制获取织入点处的方法
             MethodSignature signature = (MethodSignature) joinPoint.getSignature();
             // 获取切入点所在的方法
             Method method = signature.getMethod();
             // 获取请求的类名
             String className = joinPoint.getTarget().getClass().getName();
             // 获取请求的方法名
             String methodName = method.getName();
             methodName = className + "." + methodName;
             // 请求的参数
             Map<String, String> rtnMap = converMap(request.getParameterMap());
             UserOperationLog opLog = method.getAnnotation(UserOperationLog.class);

             // 将参数所在的数组转换成json
             String params = JSON.toJSONString(rtnMap);
             excepLog.setOperRequParam(params); // 请求参数
             excepLog.setOperMethod(methodName); // 请求方法名
             excepLog.setOperModul(opLog.operModul()); // 请求模块
             excepLog.setOperDesc(e.getClass().getName()); // 异常名称
             excepLog.setOperRespParam(stackTraceToString(e.getClass().getName(), e.getMessage(), e.getStackTrace())); // 异常信息
//             excepLog.setOperIp(IPUtil.getRemortIP(request)); // 操作员IP
             userOperationLogService.insert(excepLog);

         } catch (Exception e2) {
             e2.printStackTrace();
         }

     }
    /**
     * 转换request 请求参数
     *
     * @param paramMap request获取的参数数组
     */
    public Map<String, String> converMap(Map<String, String[]> paramMap) {
        Map<String, String> rtnMap = new HashMap<String, String>();
        for (String key : paramMap.keySet()) {
            rtnMap.put(key, paramMap.get(key)[0]);
        }
        return rtnMap;
    }

    /**
     * 转换异常信息为字符串
     *
     * @param exceptionName    异常名称
     * @param exceptionMessage 异常信息
     * @param elements         堆栈信息
     */
    public String stackTraceToString(String exceptionName, String exceptionMessage, StackTraceElement[] elements) {
        StringBuffer strbuff = new StringBuffer();
        for (StackTraceElement stet : elements) {
            strbuff.append(stet + "\n");
        }
        String message = exceptionName + ":" + exceptionMessage + "\n\t" + strbuff.toString();
        return message;
    }
}
